Manufacture of insoles



M. GRIS WOLD MANUFACTURE 'OF INSOLES Aug. 14, 1945.-

Filed July 29, 1943 i Patente'cl Aug. 14, 1945 UNITED STATES PATENT OFFICE o :2 I f 2,381,950 1 MANUFACTURE OF INSOLES Stanley Griswold, Newton, Mas assignor to B. B. Chemical 00., Boston, Mass., a corporaf tion of Massachusetts I n Application July 29, 1943, Serial M49654:

'7 Claims. (ores-22) base layer of the composite strip ispressed against This invention relates tothe manufacture of insoles, for Goodyeanwelt shoes, and particularly to. composite strips adapted for application v to insole, bodiesto form'sewing lipsthereon, and

to, methods ,ofmaking and utilizing said strips.

.Obiects of this invention, are to effect. econo- ,.mies in the manufacture of insoles and to provide an improvedinsole having a substantial'rib firm- 1y attached by cement alone tov the body of the insole.=. J Futrher objects. of the invention are'to improve and simplify the composite ribbed'strips disclosed in ,United States Letters Patent No. 2,288,4l8,-granted June 30-, 1942, on my applica- .tion,, without sacrificing their advantages. The composite strip maycomprise two layers of textile material of indefinite, length each coated on oneside withcement, for example pressure- .responsive cement uch as rubber cement, latex cement ;or cement comprising synthetic rubberlike material. ,The layers are arranged with their uncoated sides in contact and aredirectly connected, together longitudinally and continuously ofthestrip intermediate the marginsof the layers over awide transverse portionapproximately equal to the width of the base of the insole rib, by. a single continuous line of chain stitching. Thelayers forming the strip may be identical and may be either square cut or bias cut.. Preferably one ofthe layers is square cut and the other bias out, the chain of the stitches lying on the square-cutlayer. The bias-cut layer isv adapted -for attachment flatwise,.-for,example by cement, to the, marginal portion-of an insole to form a base orsupport for the insolerib, and the marginal portions of the square-cut layer are adapted tobe turned upuaboutflthe chain of the stitches and pressed against each other to form an insole .rib which, ,in'cross-section, increases in width ,fromthe outer edge ofthe rib toward its base; that is, the ribv has awide base and tapers outwardly from the base, These two layers of the composite strip will be referredto as the ribforming stripor layer and the base layer or strip.

'If desired, the rib-forming layer maybe stiffened by applying'thereto any of the stiffening materials disclosed inzmy prior patent referred .toiabove', and the insole body to which the composite stripisto be attached to form a sewing rib thereon ;may be made of cheap or thin leather or other suitable material. The marginal portion of the insole'body is coatedwith cement, preferably -with pressure-responsive cement of, oneof the kinds mentioned, and the cemented side of the insole.

'ing layer may be turned up and pressed against a the insole to cause the strip to adhere thereto,

care being taken that the area of attachment over which the layers are held together, that is, the line of chain stitches, shall occupy the position of the between-substance in a channeled The marginal portions of the rib-formeach other to cause them to adhere and form' the rib .before the base layer is attached to the insole-orv afterthe base layer has been so attached,

or ,v the rib-forming operation may be performed in conjunction with the attachment of .the base o, layer to the insole.

ably. narrower than the rib-forming layer, is applied totheicentral portion thereof and may be secured thereto with cement over the chain stitching or itmay be applied prior to the insertion of the stitches and the three layers united byrthe chain. stitchingthe chainof the stitches Jthenlyingupon the third strip so that,'when the marginal portions of the rib-forming layer are turned toward each other, the third or'reinforcing strip will by, this action be folded upon itself about the chain of the stitches and will form a wide base and a two-layer the rib- I I In place of the'third reinforcing layer, a cord or strip ofmaterial'of the desired cross-section may be laid over'th'e chain of the stitches, for example, 'in-conjunction with the operation of turning these portions up and pressing them toreinforcement for gether. "Preferably the dimensions of the core will be such that the marginal portions of the rib-fo'rminglayer will meet beyond the core and will enclose the corein the-rib-forming layer.

These and other features and aspects of the invention will appear'more fully from the following detailed description when read in connection with the accompanying drawing and will be pointed out'in the appended claims.

enclose the; chain of the stitches;

Fig. 3 is a perspective View of a modified form [in which a reinforcing strip is applied to the ribforming layer prior to the union of the strips by the chain stitch;

I Fig. 4 is a. similar view of a portion of the strip stitches and has thereby 'enclosed'thelreinforc ing strip; I

Fig. '7 is a perspective view of a modified form in which a cord or core has beenapplied over the chain of the stitching prior to its being enclosed by folding up the marginal portions o'f'the rib-" 'for-ming'layer; and

"Fig. 8 is a perspective viewof 'an insole to "which a composite ribbed strip embodying the present invention has been attached to form a sewing rib thereon.

"-Thez'composite ribbed' strip of the *present' inventionis made, as illustrated. inzFig. l, byrprovid-ing' two strips of textile :material such 'as Gem tduck, one 'for the base 'layer 'IO 1 and 1 the other for the rib -forminglayer 1 [2. The llayer HI-is coated on its'l-ower side and 1 the layer IE on its'upper side, as indicated'by stippling, zwith icement, Ipreferably pressure-responsive cement such as rubber cement, latex cementuor cements comprising syntheticnrubber like materials, "The layers; t and i2 are attached-to. each other along a* narrow longitudinal area between their; edges by a single .line aof chain :stitching M *-'which "serves to extend" the area ofattachment between i the :strips "beyond what'would be 4 provided why a single line of usual dockzstitches. the stitches servesmwhem thefree". margins of the strip: l2 are .foldedvabouti-it; to form a wide-base for the i rib and cause it x to 1 taper 1 outwardly in cross-sect-ional thickness,

The" chain of nPreferablyand as indicated .inxthetdrawing'ithe base --layer-l|] is a bias-cut itapeand the layer Z is =a-=square-cut-tape. =When .thewbaselayer is 'bias cutit conforms more readily to the contour of the insole which it must follow whenpi-applied -inguai2base 'layer,t"a rib-forming layer and-a reinthereto. -Since theyedgesgof the rib-forming layer are free to bend upwardly duringthe application of the composite. stripto, the insole,- the r'ib forming 'layer will readily conformto' the contour of the insole and hence asquare-cut tape,

which is more economical, may be used "for this layer.

The square cut rib-forminglayerilf is prererably 'formed'by cutting "Gem' duck lengthwise of the warp so that' the'filler or woof threads,

which are strongerthan thewarp threads, will extend'transversely of the 'strip'and in'the di- '-rection-of lasting strainswhen the upper is's'e- -curediirlasted"position-to therib. The stronger [2 and the three layers united by a line of chain stitches M. In Fig. 4 the free marginal portions of the strip l2 have been folded toward each other, causing the strip I6 to be folded about and to enclose the chain of the stitches l4. If de- 10 result of folding together the marginal portions of (the rib-forming layer I2 is shown in Fig. 6

" where the chain of the stitches and the folded I6 are enclosed by the ribpressed the'reon, ias 'sho'wn in Fi'gJ B. lA -mach-ine -forrperf-ormirig the: rib attachingoperation is disclosed in Letters Patent of the United States No. -2;326;119, sgrante'd Aug-ust I0, 1=943, upon applioationrofzFred'eric Elf-Bertrand.

The single chain stitch seam presents "many advantages intt'hat' a single coarse-thread of indefinite "lengthrzmay be used; no i change of bob- ;bins r-being required, -t'h-e chain of "the-"stitches provides ."a: sufficiently w-i'de base about -'-which to bend thelayernr layers whichlform therib, and,

1 inzcase: twor'rib formin'g' layers are employed; they may 1 both abe 1 secured 'I-to the base I =layer by i the singlez'line' of chain: stitches} the chain of which is 1 embraced f by the two layers a the -margin-al por- M0 -tions ofawhich are.fol'ded towardeach other; the

:chain rgiving :fbrea'dth and substance to f the four vthicknesses sofimateriar which form the rib. A1- '-so, "when? three strips :are seWe'd' together bythe *c ha'in ustitc'hes, 'it sis mrmecessary i to secure the second 'and thirdE layers together by cement.

iI-Ia'ving 2 thus described my invehtion, what I vclaim as new. andde'sire -to secure by'Letters Patent of the United States is:

.= 1. :A'strip for: forming-ribs on insoles comprisforcing llayer :applied 1 to the 1 rib forming I layer, the=-lower surface-.:of the baseJ-1ayer -being "coated with cement wherebyrsaid layer -is adaptedto be secured throughoutithe "extent of :its cemented surface' to a'n hinsoleibody, the upper "surface of cgo forcing layer so: that' whenz the -marginal: portions of the rib-forming r layerrare' folded itowar'd each a other to form the :r ib ithey Willi enclose both the rein-forcing :layer and I the chai'n iof T'the stitches and the rib willitaper outwardly ofrtheibase layer.

threads will alsobe 'enibracedby the"inseam "'c0m-posite strip' forlattaichmentflto insoles stitches when the shoe is welted.

I he layer l2 is'preferably stiffened in the manner disclosed in my -pr-ior patent above'mentioned, for example by'treatment with"a'7-0% naphtha. g

If a still: firmer rib is desired, the composite strip may be made as illustrated-iwFigs.-" 3 to" 6. In Fig. '3 a reinforcing; member such as a canvas .to 'form' sewing ribs 1 thereon -:comprising a base -str=ip 'cementedvonits lowerexposed-surface, and a-plurality:ofrrib formingstripsof.fdiii rentwiclths secured to: the uncementedaside of Ithe base:..str-ip -solutionof Nuba in 'eq-ual parts; of benzol and y a-line ofichain stitchesrthe chain: ofcthestitches being L on the narrower wof the plurality of vpib- "forming-rstrips, thg free margins: of'the wi'derr ribtormingzstripibeing foldedftowaiidreachrother and -securedtogether .tosenclose themhainistitches'and strip l6 .hasbeen laid-uponither ib forming layer in the narrow ribF-torming-strip.

3. An insole comprising an insole-shaped body, a strip secured by cement alone to the marginal portion of the body, and a sewing rib held by chain stitches to said cemented strip, therib com prising two layers one narrower than the other folded. upon themselves and both enclosing the chain of'the stitches, the margins of the wider rib-forming layer being secured together. to enclose the narrower layer and the chain of the stitches. p I

4. An insole for use in making welted shoes comprising an insole body, a base layer strip secured by cement alone to the marginal portion of the insole body, and a plurality of strips attached by a single line of chain stitches to the central portion of said base layer strip, the free marginal portions of said plurality of layers being turned upwardly and secured together to form a sewing rib. v

5. That improvement in methods of forming composite strips for attachment to insoles which comprises providing a base stripattaching aplurality of strips of material between their edges to the base strip by a line of chain stitches and folding the free margins of all of the strips except the base strip to enclose the chain of the stitches to form a sewing rib, the margins of the base strip forming attaching flanges.

6. That improvement in methods 'of forming composite strips for attachment to insolves to form sewing ribs thereon which comprises providing a strip cemented on one side to form a base layer, attaching a plurality of strips one narrower than the other to the base layer by a line of chain stitches, and turning up the margins of the wider strip to enclose the narrower strip and the chain of the stitches.

'7. That improvement in methods of making insoles which comprises providing a composite strip composed of a base layer and a plurality of strips I secured together by a continuous line of chain 

